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411. predict() option unsuitable for marginal effects
     When I run mfx, I am getting the error message “predict() option unsuitable for marginal
     effects”. What does that mean?

412. Scaling and marginal effects
     When I run mfx, I am getting the warning message "warning: derivative missing; try rescaling
     variable mpg". What does that mean?

413. Repeated-measures ANOVA examples
     Why do I get an error message when I try to run a repeated-measures ANOVA?

414. Why is there no intercept in lasso inferential commands? Is it possible to get an intercept?
     Why is there no intercept in lasso inferential commands? Is it possible to get an intercept?

415. Combining results other than coefficients in e(b) with multiply imputed data
     How can I combine results other than coefficients in e(b) with multiply imputed data?

416. Instrumental variables for triangular/recursive systems with correlated disturbances
     How do I estimate recursive systems using a subset of available instruments?

417. Obtaining marginal effects and their standard errors after estimations with interactions
     I am using a model with interactions. How can I obtain marginal effects and their standard errors?

418. Number of observations for subpopulation estimation
     How is the number of observations computed for subpopulation estimation?

419. Single degree-of-freedom tests after ANOVA using nonresidual error
     How can you specify a term other than residual error as the denominator in a single
     degree-of-freedom F test after ANOVA?

420. Chow tests
     Can you explain Chow tests?



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